I totally have to say the same thing. I think soundtracks and scores are underrated.
I personally do like Steve Jablonsky as a composer. He did the Transformers Scores and The Island (others too). I really like the way he combines the orchestra with some electronic sounds . My favorite tracks by him "Bumblebee" and "Optimus vs. Megatron". I do have to say that I also enjoy the movie. The second one is really bad, like the Score too.
Other soundtracks I like are the complete recordings for the Lord of the Rings, which I think is a marvelous piece. It is although quite difficult to listen to it, like I mentioned it in another thread. (did the whole listening of exactly 9.9 hours only once and it is just impressive how the music develops, but extremely exhaustive too)
More composers I can think of right now are:
- James Horner with Avatar (favorite songs "The Bioluminescence Of The Night" and "Becoming One Of "The People" / Becoming One With Neytiri")
- Atticus Ross with The Book of Eli (favorite song "Panoramic")
- Clint Mansell with The Fountain (excellent movie by the way) (favorite song "Death is the Road to Awe)
- How to train your Dragon by John Powell (favorite song "Forbidden Friendship")
There are many more in my library, but I have to look up ;)